9 replies to this topic

[Freeman4gu]

Hello,

I am new to that hole electronic world and at the moment I am trying to control a brushless motor with my netduino.
The controller has a kind of handshake:

• full speed (needs at least 1.5ms duration)
• connect akku
• zero speed
  {*]beep beep beep!
• ready

so i use the following code, but it did not seem to work, I already tried other ways, but nothing seems to work

PWM Servo1 = new PWM(Pins.GPIO_PIN_D5);
Servo1.SetDutyCycle(1);
Servo1.SetPulse(20000, 1800);
Thread.Sleep(300);

while (true)
{
    Servo1.SetDutyCycle(1);
    Servo1.SetPulse(20000, 1500);
    Thread.Sleep(300);
}

it would be nice if any of you could help me

Attached Files

•  Snapshot_20110819.JPG   85.08KB   72 downloads

[Stefan]

Hi and welcome to the Netduino community!

Perhaps the best way to drive DC-motors is through a motor driver IC. The most common one is the SN754410 H-Bridge Motor Driver.
It's the same used on a motor shield I wrote some code for:
https://stefan.co/ne...rshield-driver/

You could also build up this schematic:
http://wiki.netduino...itor-Motor.ashx

Good luck!


-edit- wait, appairently it has Electronic speed control. Itsdan is already helping you out in Chat I see

Edited by Stefan, 19 August 2011 - 04:40 PM.

[Freeman4gu]

ok so far I got some help in the chat there are already a library for esc http://forums.netdui...ino-esc-driver/

[Freeman4gu]

wohooo i made it works fine, thank you for your help

[Chris Seto]

Hi and welcome to the Netduino community!

Perhaps the best way to drive DC-motors is through a motor driver IC. The most common one is the SN754410 H-Bridge Motor Driver.
It's the same used on a motor shield I wrote some code for:
https://stefan.co/ne...rshield-driver/

You could also build up this schematic:
http://wiki.netduino...itor-Motor.ashx

Good luck!


-edit- wait, appairently it has Electronic speed control. Itsdan is already helping you out in Chat I see

Brushless motors are 3 phase AC motors, and thus cannot be controlled as a brushed DC motor.

The ESC already acts as the motor controller, so I think he just needs help with generating the proper waveform in proportion to the proper throttle setting, for which I do have a library out for (As linked)...

Hope it works for you, enjoy!

[netdontknow]

ok so far I got some help in the chat

there are already a library for esc
http://forums.netdui...ino-esc-driver/

Freeman4gu,

How did you get it to work?
I have tried this driver on both Netduino & Netduino Plus, It seems like it almost works, I can hear the gearbox makes clicking noise, and when it is... I measured the voltage on the motor using my voltage meter it reads 0.14 to 0. it seems that the gearbox was attempting to spin the wheel to sastify me... but it couldn't for some reasons.

Here is my connecting diagram, + code solution, see if anyone see anything wrong with that code? it was coppied straight out of Chris's post.

Thanks!

Attached Files

•  Netduino Plus to XL5 Diagram.pdf   4.56KB   50 downloads
•  MotorShieldDriver101.zip   144.07KB   22 downloads

[Chris Seto]

Connection diagram looks fine, make sure you calibrate the ESC.

[netdontknow]

Connection diagram looks fine, make sure you calibrate the ESC.

Chris,
could you give me the step to calibrate this ESC

Thanks

[Chris Seto]

This is some very old code (lots of bad form), but it should give you an idea of what needs to be done. You will need to adapt this for the Netduino as it is currently meant for the GHI boards. http://files.chrisseto.com/bhF

[ocram]

wohooo i made it works fine, thank you for your help

how? I not can!